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2 DA WDS · 03-28-2008, 11:49 AM

No the checkvalve on the water tank is just for winterizing. The 'backflow preventer' is actually in the Black Tank flush water line to prevent waste from getting back to the fresh water connection. And it is made of plastic and they do break.
A friend of mine had his hot water check valve fail and it reduced the hot water flow to a trickle. He replaces the valve and was back in business.

03-28-2008, 11:49 AM	#10
2 DA WDS Senior Member Join Date: Jun 2005 Location: Illinois Posts: 527	Backflow preventer No the checkvalve on the water tank is just for winterizing. The 'backflow preventer' is actually in the Black Tank flush water line to prevent waste from getting back to the fresh water connection. And it is made of plastic and they do break. A friend of mine had his hot water check valve fail and it reduced the hot water flow to a trickle. He replaces the valve and was back in business. __________________ Happy Trails To You Tom & Cheryl Brockman S.O.I.T.C. Charter Member 2015 39DBRS3, Truma water heater, 2inch lift, custom paint 2011 RAM Cummins 3500 Dually